1 /*
2 * c 2001 PPC 64 Team, IBM Corp
3 *
4 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU General Public License
6 * as published by the Free Software Foundation; either version
7 * 2 of the License, or (at your option) any later version.
8 */
9 #ifndef _ASM_POWERPC_PPC_PCI_H
10 #define _ASM_POWERPC_PPC_PCI_H
11 #ifdef __KERNEL__
12
13 #ifdef CONFIG_PCI
14
15 #include <linux/pci.h>
16 #include <asm/pci-bridge.h>
17
18 extern unsigned long isa_io_base;
19
20 extern void pci_setup_phb_io(struct pci_controller *hose, int primary);
21 extern void pci_setup_phb_io_dynamic(struct pci_controller *hose, int primary);
22
23
24 extern struct list_head hose_list;
25
26 extern void find_and_init_phbs(void);
27
28 extern struct pci_dev *isa_bridge_pcidev; /* may be NULL if no ISA bus */
29
30 /** Bus Unit ID macros; get low and hi 32-bits of the 64-bit BUID */
31 #define BUID_HI(buid) upper_32_bits(buid)
32 #define BUID_LO(buid) lower_32_bits(buid)
33
34 /* PCI device_node operations */
35 struct device_node;
36 typedef void *(*traverse_func)(struct device_node *me, void *data);
37 void *traverse_pci_devices(struct device_node *start, traverse_func pre,
38 void *data);
39
40 extern void pci_devs_phb_init(void);
41 extern void pci_devs_phb_init_dynamic(struct pci_controller *phb);
42
43 /* From rtas_pci.h */
44 extern void init_pci_config_tokens (void);
45 extern unsigned long get_phb_buid (struct device_node *);
46 extern int rtas_setup_phb(struct pci_controller *phb);
47
48 extern unsigned long pci_probe_only;
49
50 /* ---- EEH internal-use-only related routines ---- */
51 #ifdef CONFIG_EEH
52
53 void pci_addr_cache_insert_device(struct pci_dev *dev);
54 void pci_addr_cache_remove_device(struct pci_dev *dev);
55 void pci_addr_cache_build(void);
56 struct pci_dev *pci_get_device_by_addr(unsigned long addr);
57
58 /**
59 * eeh_slot_error_detail -- record and EEH error condition to the log
60 * @pdn: pci device node
61 * @severity: EEH_LOG_TEMP_FAILURE or EEH_LOG_PERM_FAILURE
62 *
63 * Obtains the EEH error details from the RTAS subsystem,
64 * and then logs these details with the RTAS error log system.
65 */
66 #define EEH_LOG_TEMP_FAILURE 1
67 #define EEH_LOG_PERM_FAILURE 2
68 void eeh_slot_error_detail (struct pci_dn *pdn, int severity);
69
70 /**
71 * rtas_pci_enable - enable IO transfers for this slot
72 * @pdn: pci device node
73 * @function: either EEH_THAW_MMIO or EEH_THAW_DMA
74 *
75 * Enable I/O transfers to this slot
76 */
77 #define EEH_THAW_MMIO 2
78 #define EEH_THAW_DMA 3
79 int rtas_pci_enable(struct pci_dn *pdn, int function);
80
81 /**
82 * rtas_set_slot_reset -- unfreeze a frozen slot
83 * @pdn: pci device node
84 *
85 * Clear the EEH-frozen condition on a slot. This routine
86 * does this by asserting the PCI #RST line for 1/8th of
87 * a second; this routine will sleep while the adapter is
88 * being reset.
89 *
90 * Returns a non-zero value if the reset failed.
91 */
92 int rtas_set_slot_reset (struct pci_dn *);
93 int eeh_wait_for_slot_status(struct pci_dn *pdn, int max_wait_msecs);
94
95 /**
96 * eeh_restore_bars - Restore device configuration info.
97 * @pdn: pci device node
98 *
99 * A reset of a PCI device will clear out its config space.
100 * This routines will restore the config space for this
101 * device, and is children, to values previously obtained
102 * from the firmware.
103 */
104 void eeh_restore_bars(struct pci_dn *);
105
106 /**
107 * rtas_configure_bridge -- firmware initialization of pci bridge
108 * @pdn: pci device node
109 *
110 * Ask the firmware to configure all PCI bridges devices
111 * located behind the indicated node. Required after a
112 * pci device reset. Does essentially the same hing as
113 * eeh_restore_bars, but for brdges, and lets firmware
114 * do the work.
115 */
116 void rtas_configure_bridge(struct pci_dn *);
117
118 int rtas_write_config(struct pci_dn *, int where, int size, u32 val);
119 int rtas_read_config(struct pci_dn *, int where, int size, u32 *val);
120
121 /**
122 * eeh_mark_slot -- set mode flags for pertition endpoint
123 * @pdn: pci device node
124 *
125 * mark and clear slots: find "partition endpoint" PE and set or
126 * clear the flags for each subnode of the PE.
127 */
128 void eeh_mark_slot (struct device_node *dn, int mode_flag);
129 void eeh_clear_slot (struct device_node *dn, int mode_flag);
130
131 /**
132 * find_device_pe -- Find the associated "Partiationable Endpoint" PE
133 * @pdn: pci device node
134 */
135 struct device_node * find_device_pe(struct device_node *dn);
136
137 void eeh_sysfs_add_device(struct pci_dev *pdev);
138 void eeh_sysfs_remove_device(struct pci_dev *pdev);
139
eeh_pci_name(struct pci_dev * pdev)140 static inline const char *eeh_pci_name(struct pci_dev *pdev)
141 {
142 return pdev ? pci_name(pdev) : "<null>";
143 }
144
145 #endif /* CONFIG_EEH */
146
147 #else /* CONFIG_PCI */
find_and_init_phbs(void)148 static inline void find_and_init_phbs(void) { }
init_pci_config_tokens(void)149 static inline void init_pci_config_tokens(void) { }
150 #endif /* !CONFIG_PCI */
151
152 #endif /* __KERNEL__ */
153 #endif /* _ASM_POWERPC_PPC_PCI_H */
154